2. Simple Concept
For a beam subjected to bending,
Elongation occurs on one surface and
shortening on the opposite surface of the
beam. There is a (neutral) plane through the
beam which does not change in length
during bending.
16. WAS THE WTC DEFECTIVELY
DESIGNED?
The World Trade Center was not
defectively designed
Skyscrapers are designed to support
themselves for three hours during fire.